an un-roofed interior courtyard or room in a roman house, sometimes having a pool or garden, sometimes surrounded by columns.

barrel valt

An elongated or continuous semicircular vault, shaped like a halfcylinder.

Groin Vault

two barrel vaults joined perpendicular

Verism

style in which artist concerns themselves with describing the exterior likeness of an object or person, usually by rendering its visible details in a finely executed meticulous manner.

Oculus

In architecture, a circular opening, Usually found either as windows or at the apex of a dome. When at the top of a dome, an oculus is wither open to the sky or covered by a jdecoritive exterior lantern

menorah

A Jewish lamp-stand with seven or nine branches: the nine-branched menorah is used during the celebration of Hanukkah. Representations of the seven-branched menorah, once used in the Temple of Jerusalem, became a symbol of Judaism.

keystone

the topmost voussoir at the center of an arch, last block to be placed. the pressure of this block holds the arch together.